Intermediate System to Intermediate System (IS-IS) is a link-state interior gateway protocol (IGP) widely used in service provider and large enterprise networks due to its scalability, fast convergence, and protocol flexibility.
Unlike OSPF, IS-IS runs directly over Layer 2 (without IP encapsulation), making it highly efficient for large-scale routing. It supports multi-level hierarchy (Levels 1 & 2), ECMP (Equal-Cost Multipath Routing), and seamless integration with MPLS and segment routing.
This lab provides hands-on experience configuring IS-IS adjacency formation, area design, metric tuning, route propagation, and authentication, ensuring you're fully equipped to implement and troubleshoot IS-IS in CCIE SP environments.
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The default username and password for images used in this course is as follows, however you will hear new passwords during the course if the instructor changes the credentials:
Image name | Username | Password |
IOL images | No username | No password |
CSR1000v | Admin | Admin |
C8000v | Admin | admin |
Viptela devices | Admin | admin |
Windows Server | Administrator | Test123 |
IOS-XR | Admin | Enter new password |
Cisco ASA 802 | no username | no passwd, hit enter |
Cisco ASA 8.4.2, 9.1.5 | no username | no passwd, hit enter |
Cisco ASAv | no username | no passwd, hit enter |
Cisco IPS | cisco | ciscoips123 |
Cisco WSA | admin | ironport |
Cisco ESA | admin | ironport |
Cisco WAAS | admin | default |
Cisco XR9K | Cisco | Cisco |
Cisco NX9K | admin | admin |
